"Guitar Hero IV will follow closely in the footsteps of Rock Band, offering new instruments including a bass, microphone, and six-piece drumset that includes two cymbals. It is unknown whether or not the Guitar Hero IV instruments and Rock Band instruments will be cross-compatible.[image via/ read more at dugmirror]
Rock stars can step into the studio to create their own songs and share them with other players online courtesy of the newly minted Guitar Hero Tunes service, but these tracks will be devoid of vocals.
While no song titles were yet confirmed, Van Halen, The Eagles, Sublime, and Linkin Park will all be making appearances on the tracklist."